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Old 10-04-2012, 02:42 PM
mileschen mileschen is offline
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Join Date: Sep 2012
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Default Questions about Symmetry and Average Intensity of Zip Code digit

I have some questions about the Symmetry and Average Intensity of the image of Zip Code digit. That is, what the definition of them?

For a digit in the data, there are 256 grayscale values ranging from -1 to 1, -1 here denotes white, 1 is black. But when plotting in Matlab, the image should be 16 x 16 matrix, and with 1 means white, 0 means black.

Then, does Symmetry should be calculated based the on the 16 x 16 matrix of the grayscale values? Also, does the average intensity means that it is the mean value of the 256 grayscale values (between -1 and 1)?
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